This name is a synonym of Begonia pachyrhachis L.B.Sm. & Wassh..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 361336) with original publication details: Nat. Pflanzenfam. 3(6a): 149 1894.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:104474-1.
This name was in version 1 of The Plant List, record kew-361336, and has not been changed.